https://gcc.gnu.org/bugzilla/show_bug.cgi?id=102952
--- Comment #8 from H.J. Lu <hjl.tools at gmail dot com> --- (In reply to peterz from comment #7) > (In reply to H.J. Lu from comment #3) > > Created attachment 51678 [details] > > A patch to add -mharden-sls= > > > > x86: Add -mharden-sls=[none|all|return|indirect-branch] > > > > Generate code to mitigate against straight line speculation. > > I'm getting (a lot) spurious int3 instructions with this, for example: > > 0000000000000280 <do_SYSENTER_32>: > 280: 48 81 8f 90 00 00 00 00 02 00 00 orq $0x200,0x90(%rdi) > 28b: 48 8b 47 20 mov 0x20(%rdi),%rax > 28f: 48 89 87 98 00 00 00 mov %rax,0x98(%rdi) > 296: e9 75 ff ff ff jmp 210 <do_fast_syscall_32> > 29b: cc int3 > > That's not an *indirect* jump there. Please provide a testcase.
